BIRKENHAUER, Josef. Begriffe im Geographieunterricht (Teil I). Journal of Geography Education, [S. l.], v. 24, n. 1, p. 1–15, 1996. DOI: 10.60511/zgd.v24i1.336. Disponível em: https://zgd-journal.de/index.php/zgd/article/view/336. Acesso em: 2 apr. 2026.